JP2530266B2 - Air bleeder in bag for vertical bag filling and packaging machine - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an in-bag air bleeding device for bleeding air from the inside of a bag when end-sealing a tubular film filled with an article to be packed in a vertical bag-making filling and packaging machine. is there.

[0002]

2. Description of the Related Art Conventionally, in a vertical bag-making filling and packaging machine equipped with a rotary end sealer, a tubular film having an end seal at its lower end is filled with an object to be packaged, and then the tubular film is end-sealed. As a device for bleeding air from the inside of the bag when applying, a device having a structure as shown in FIG. 12 is known. This device includes a pair of support plates 16 and 16 arranged to face the rotary shafts 14 of the seal bodies 12 and 12 arranged at positions sandwiching the tubular film 10 with a predetermined gap in the axial direction.
A plurality of elastic members 18 such as springs or sponges are provided between the support plates 16 and 16 at a position on the front side in the rotation direction of the seal body 12 and on the rotation circumference of the tip of the seal body between the support plates 16 and 16. It has been passed over. That is, FIG.
As shown in (b), by rotating the pair of seal bodies 12, 12 in mutually opposite directions, the support plate 16 and the elastic member 18 move integrally, and the both seal bodies 12, 12 mesh with each other. Before applying the end seal to the tubular film 10,
The elastic members 18 and 18 are designed to squeeze the tubular film 10 from both sides to remove air from the bag.

[0003]

In the air bleeding device described above, in order to sufficiently bleed the air inside the bag, it is necessary to dispose a plurality of elastic members 18 in the circumferential direction on the front side in the rotational direction of the seal body 12. There is. However, when the elastic member 18 is arranged at a position separated from the seal body 12, the elastic members 18, 1 are long before the seal bodies 12, 12 mesh with each other.
8 squeezes the tubular film 10 and squeezes it (see FIG. 12 (b)), making it impossible to drop the packaged product thereafter. That is, it is not possible to secure a sufficient drop supply time for the packaged object, and the packaged object in the process of falling falls on the elastic member 1.
There is a problem that it is sandwiched between 8 and 18, and reliable air bleeding cannot be achieved, and that the sealed objects 12 and 12 bite the packaged object.

In the air venting device, the seal body 1
It is pointed out that the plurality of elastic members 18, 18 moving with the rotation of 2 gradually perform the air bleeding action, so that the air inside the bag cannot be surely bleeded. Further, since the elastic member 18 is simply stretched over the support plates 16 and 16, when the elastic member 18 is loosened or “settles”, the elastic members 18 and 18 pinch the tubular film 10 while pressing it. Occasionally, there is a situation in which the seal bodies 12, 12 are elastically deformed and caught when they are moved.

The seal bodies 12 and 12 have a feeding speed of the tubular film 10 and the seal body 1 when the end seal is applied to the tubular film 10 (when the seal bodies 12 and 12 are engaged with each other).
The speed is generally controlled so that the peripheral speed of 2 is the same. Therefore, when the elastic members 18, 18 separated from the seal body 12 press the tubular film 10, the elastic members 18, 18 and the tubular film 10 are contacted with each other with a required speed difference. You will come into contact with them. Therefore, there is a drawback that the tubular film 10 slides on the elastic members 18, 18 and the elastic member 18 is worn in a short period of time.

[0006]

SUMMARY OF THE INVENTION The present invention has been proposed in view of the above-mentioned various drawbacks inherent in the air bleeding apparatus, and it has been proposed to suitably solve the drawbacks. It is an object of the present invention to provide a means that can secure the air conditioner and can surely remove the air inside the bag.

[0007]

SUMMARY OF THE INVENTION In order to overcome the above-mentioned problems and achieve the intended purpose, the present invention is directed to oppositely sandwiching a vertically formed film formed into a tubular shape. In a vertical bag-making filling and packaging machine having a pair of rotating sealing bodies and end-sealing by sandwiching a tubular film between the sealing bodies, a seal in a holder that moves in synchronization with each of the sealing bodies. The tubular film is rotatably supported at a position facing the front side in the rotation direction of the body, and is supported over the entire length of the tubular film in the width direction and the required length in the feeding direction.
The width of the tubular film is set so that it can be touched.
And a pair of pads that can come into contact with each other over a wide required area in the feeding direction, and a cam follower that is pivotally supported by a lever that is arranged on the fixed portion of the packaging machine and is integrally movable on each pad. engages the consists of a cam to impart desired camming said pad, said cam follower moves along the cam surface of the cam member, the pair
The pad moves at a speed close to the feeding speed of the tubular film.
Contact with proximity to Irumu, just before applying end sealing said pair of sealing members are sandwiched between the tubular film, the pair of pads to perform air vent and nipped with a wide range of required area the tubular film It is characterized in that it is configured as follows. In order to achieve the above-mentioned object, another invention of the present application is to sandwich a film which is formed into a tubular shape and is vertically supplied.
A pair of seals that rotate in opposite directions
It is equipped with both seals to hold the tubular film.
Vertical bag filling and packaging machine with more end seals
At the holder that moves synchronously with each of the seals
Rotate freely to the position facing the front side of the seal body in the rotating direction
It is pivotally supported and has a required length in the feeding direction of the tubular film.
One tubular film with a required area over the entire length in the width direction
Of a pair of pads that can abut the strip-shaped film,
It is arranged on the fixed part and is provided so that it can move integrally with each pad.
A cam follower pivotally supported on the lever is movably engaged
And a cam body (52), wherein the cam body is a cam follower.
By moving along the contact surface, the pair of seal bodies
Immediately before clamping the tubular film and applying the end seal.
A surface of the pair of pads facing the tubular film.
Slanted shape in which the lower end of the
Moves closer to the tubular film by force, and then the tubular film
Keep the required area of the tubular film in a parallel posture.
Shape that gives a cam motion by pinching and pinching air
It is characterized in that it is configured to be formed .

[0008]

When a predetermined amount of the object to be packaged is dropped and supplied to the tubular film having the end seal at the lower end, the pair of seal bodies rotate in mutually opposite directions, and at the front side in the rotation direction of each seal body. The facing pad also moves synchronously. By moving the cam follower arranged on each pad along the cam surface of the cam body, the required cam movement is given to the pad, and immediately before the pair of seal bodies clamps the tubular film, the cylinders are moved by the opposing pads. The film is clamped in the required area. As a result, after the air in the bag is surely removed, the end seal is performed by the seal body.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a preferred embodiment of the air bleeding device in a vertical bag-making filling and packaging machine according to the present invention will be described below with reference to the accompanying drawings.

FIG. 1 shows an air bleeder in a bag according to an embodiment.
FIG. 1 is a cross-sectional plan view showing an end seal part in a vertical bag-making filling and packaging machine provided with (hereinafter also simply referred to as “air bleeding device”). As shown in the figure, a pair of rotating shafts 14, 14 are rotatably supported in parallel between the machine frames 20, 20 functioning as fixing parts of the packaging machine, which are spaced apart from each other by a predetermined distance, and are parallel to each other. The rotating shafts 14 and 14 are adapted to be synchronously rotated in mutually opposite directions by a driving means (not shown). Each rotary shaft 14 has a seal body 12 protruding in the radial direction.
It is arranged over a predetermined length in the axial direction. As shown in FIG. 2, inside the seal body 12, cartridge heaters 22, 22 parallel to the longitudinal direction of the seal body 12 are arranged,
The heater 22 functions to heat the sealing body 12 to the proper sealing temperature of the tubular film 10. That is, when the pair of rotating shafts 14 and 14 rotate synchronously in mutually opposite directions and the opposing seal bodies 12 and 12 are engaged with each other, the end seal is applied to the tubular film 10 passing between the seal bodies 12 and 12. Is given.

The sealing film 12 has a tubular film 10
Is provided with a knife (not shown) that cuts the bag in the width direction, and is configured to cut the tubular film 10 at the same time as end-sealing the same to separate the bag body filled with the object to be packaged. . Further, a temperature detecting means 25 such as a thermistor is provided in the seal body 12, and the energization control of the heater 22 is performed based on the temperature detected by the detecting means 25, so that the seal body 12 is kept at a constant temperature. It has become. Further, the heat pipes 24, 2 are provided along the sealing surface at an inner position of the sealing body 12 close to the sealing surface.
4 is provided so that the temperature distribution in the longitudinal direction of the seal body 12 heated by the heater 22 is uniform.

(Regarding Air Venting Device) Each Rotating Shaft 1
4, when the end seal is applied to the tubular film 10,
A pad 28 that constitutes an air bleeding device 26 for bleeding air from the inside of the bag and a mechanism 30 that controls the posture of the pad 28 are provided respectively, and the pads 28 and 28 facing each other cooperate with each other to protect the inside of the bag. It is configured to bleed air. Since the pads 28 and the attitude control mechanism 30 arranged on each rotary shaft 14 are symmetrical, the members arranged on the upper rotary shaft 14 in FIG. The same members are designated by the same reference numerals and the description thereof will be omitted.

As shown in FIG. 3, the rotary shaft 14 is provided with an L-shape at a position where the seal body 12 is sandwiched at a predetermined distance in the axial direction.
Holders 32, 32 having a character shape are arranged opposite to each other, and the holder 32 is fixed to the rotary shaft 14 via a bolt 34 so as to be integrally rotatable. Vertical part 3 in each holder 32
As shown in FIG. 2, 2a faces the front side in the rotation direction of the seal body 12, and has a through hole 32b formed in the vicinity of the end thereof in parallel with the rotation shaft 14. And the pair of vertical parts 3
The support member 36 of the pad 28 faces between 2a and 32a, and the projecting shaft 3 is provided at both ends of the support member 36 in the longitudinal direction.
6a and 36a are rotatably inserted into the corresponding through holes 32b and 32b.

As shown in FIG. 5, on the lower surface of the support member 36, horizontal portions 38a of a bracket 38 having an L-shaped cross section are arranged with a plurality of spacers 40 arranged at predetermined intervals in the longitudinal direction.
Are positioned parallel to each other with a predetermined distance therebetween. Then, the bolts 42 inserted through the holes 38c, 40a formed in the horizontal portion 38a and the spacer 40 are screwed into the female screw holes 36b formed in the support member 36, whereby the bracket 38 is fixed to the support member 36. The pad 28 is disposed and fixed via a mounting plate 44 on a side portion of the vertical portion 38b of the bracket 38 that is separated from the seal body 12 (a side that faces the other opposing bracket 38). The pad 28 is set to have a length dimension capable of pressing the entire length of the tubular film 10 in the width direction, and a dimension capable of abutting for a predetermined length in the feeding direction of the tubular film 10. It is configured so that the tubular film 10 can be pinched with a required area when bleeding air, which will be described later.

The horizontal portion 38a of the bracket 38
The hole 38c formed in the hole is formed as a long hole extending in the lateral direction of the horizontal portion 38a, and the position of the pad 28 can be adjusted by moving and adjusting the bracket 38 with the bolt 42 loosened. I am supposed to get involved. The pad 28 and the mounting plate 44 are covered with a cover 46 made of a fluororesin or the like, and are configured to improve heat resistance and durability.

One protruding shaft 3 of the support member 36
As shown in FIGS. 3 and 4, 6a projects outward from the vertical portion 32a of the holder 32, and the lever 48 is attached to the projecting end portion.
Are provided so as to rotate integrally. A cam follower 50, which projects toward the side opposite to the side surface toward the support member 36, is rotatably supported at a position deviated from the position where the protruding shaft 36a is disposed on the lever 48. By moving the cam follower 50 along the outer peripheral surface (cam surface) of the cam plate 52, which will be described later, the pad 28 is given a required cam movement (see FIG. 6). A tension spring 54 is stretched between the lever 48 and the holder 32 as shown in FIG. 3, and the tension spring 54 is
The cam follower 50 functions to constantly press the cam surface of the cam plate 52.

On the machine frame 20 facing the lever 48,
The fixed holder 56 is fixed through a plurality of bolts 58 at a position facing the middle of the pivotal support positions of the both rotary shafts 14, 14, and a plurality of cam holders 60 parallel to the machine frame 20 are provided on the fixed holder 56. It is fixed via a bolt 62. As shown in FIG. 3, a boss portion 64a of an adapter 64 into which the rotary shaft 14 is rotatably inserted is detachably fixed to a position of the cam holder 60 corresponding to each rotary shaft 14. Then, a cam plate 52 of the illustrated shape is fixed to a flange portion 64b formed on the side of the adapter 64 that faces the lever 48 via a plurality of bolts 66, and the cam follower 50 is provided on the outer peripheral surface of the cam plate 52. It is configured to abut slidably. That is, the cam follower 50 that moves with the rotation of the rotary shaft 14
Moves along the outer peripheral surface of the positioned and fixed cam plate 52.

The cam plate 52 has a required cam surface formed on the outer peripheral surface thereof, and functions to impart the movement as shown in FIG. 6 to the pad 28 via the cam follower 50 moving along the cam surface. To do. That is, the pad 28 is opposed to the tubular film 10 in the pad 28 with reference to the state in which the pad 28 is separated from the tubular film 10 and faces in parallel (the state in which the seal body 12 is located right above the rotating shaft 14). In a posture in which the lower end of the surface to be moved moves closer to the tubular film 10 in an inclined posture in which it is separated from the tubular film 10 from its upper end, and then the pad 28 is parallel to the tubular film 10,
It is set so as to clamp the tubular film 10. Further, the pads 28, 28 are set so as to hold the posture in which the tubular film 10 is clamped until the pair of seal bodies 12, 12 mesh with each other, and separate after the seal bodies 12, 12 mesh with each other.

The timing at which the tubular film 10 is clamped by the pads 28, 28 is set to the sealing body 12, 1
It is set just before the 2 meshes. As a result, it is possible to ensure a sufficient drop supply time of the packaged object and to reliably perform air bleeding. Further, the movement trajectory of the pad 28 can be displaced in the circumferential direction by rotationally adjusting the adapter 64 with respect to the cam holder 60.

[0020]

Operation of the Embodiment Next, the operation of the in-bag air bleeding device according to the embodiment thus constructed will be described. As shown in FIG. 7, a tubular film 10 formed into a tubular shape by a bag-making device (not shown) and having an end seal at the lower end is fed downward between the pair of rotary shafts 14, 14. It has been done. Further, the description will be given with reference to the state in which the seal body 12 is located right above the rotary shaft 14.

When the rotary shafts 14 and 14 synchronously rotate in mutually opposite directions, the cam follower 50 pivotally supported by the lever 48 moves along the cam surface of the cam plate 52. As a result, the pad 28, which is integrally and rotatably disposed on the lever 48 via the support member 36, moves from the posture facing the tubular film 10 in parallel with the tubular film 10 as shown in FIG. The lower end of the facing surface is higher than the upper end of the tubular film 10.
It moves closer to the tubular film 10 in an inclined posture away from. In this state, the tubular film 10 is slightly squeezed inward, but since it is not completely pinched, the object to be packaged falls inside the tubular film 10 facing between the pads 28, 28.

When the rotary shafts 14, 14 further rotate,
As shown in FIG. 9, the pad 28 is in a posture parallel to the tubular film 10, and the tubular film 10 is completely pinched by the pads 28, 28 to evacuate the air inside the bag. At this time, since the two pads 28, 28 pinch the tubular film 10 in a required area as is clear from the figure,
The air inside the bag can be reliably removed. Moreover, the state in which the tubular film 10 is pressed by the pads 28, 28 is
As shown in FIG. 10, since it continues until the seal bodies 12, 12 are engaged with each other, air does not enter the tubular film 10 when the pads 28, 28 are separated from each other. The position of the pad 28 is changed by adjusting the bracket 38 with respect to the support member 36, and the timing of the cam movement in the pad 28 is changed by adjusting the adapter 64 with respect to the cam holder 60.
Thus, the timing of pinching the tubular film 10 can be changed. Thereby, the amount of air extracted from the tubular film 10 can be adjusted.

Next, the sealing bodies 12 and 12 are meshed with each other with the tubular film 10 sandwiched therebetween, whereby the tubular film 10 is end-sealed and cut by a knife to fill an object to be packaged. At the same time, the air deflated bag is separated. In addition, the seal body 12, 12
11, the pair of pads 28, 28 are separated from each other and release the tubular film 10 at a required timing after the meshing. In this way, the seal bodies 12, 12
Since the pair of pads 28, 28 presses the tubular film 10 in a required area immediately before the engagement, the end seal can be surely applied to the tubular film 10 that has been deflated. The pads 28, 28 are the tubular film 10
Since the tubular film 10 is squeezed at the timing of moving at a speed close to the feeding speed of, the "rubbing" of the pad 28 with respect to the tubular film 10 can be minimized, and wear of the pad 28 is prevented. obtain. Further, there is also an advantage that a stable seal can be provided without forcibly pulling the tubular film 10 downward by the pads 28, 28.

[0024]

As described above, according to the in-bag air bleeding device in the vertical bag-making filling and packaging machine according to the present invention, the cylinder moving immediately before the seal body is engaged by the pad that moves in synchronization with the seal body. Since the film-shaped film is configured to be squeezed in the required area, the air inside the bag can be reliably released. In addition, it is possible to sufficiently secure the drop supply time of the packaged object and prevent the occurrence of biting of the packaged object. In addition, the pair of pads are close to the feeding speed of the tubular film.
Since the film is pinched at a similar speed, the cylinder
To minimize the " rubbing " of the pad against the film
Pad wear can be prevented. Furthermore, on the pad
Since it does not pull the tubular film in the feeding direction more,
There is also an advantage that a stable seal can be provided.

Further, since the pad is set so that the lower end of the surface facing the tubular film comes close to the tubular film in an inclined state so as to be separated from the tubular film, the object to be packaged falling between the two pads is sandwiched between the pads. Can be prevented.

[Brief description of drawings]

FIG. 1 is a cross-sectional plan view showing an end seal part of a vertical bag-making filling and packaging machine that employs an air bleeding device according to an embodiment.

FIG. 2 is a sectional view taken along line II-II in FIG.

FIG. 3 is a partially cutaway front view showing respective members constituting a seal body and an air bleeding device arranged on one rotating shaft.

FIG. 4 is a schematic perspective view of a main part showing an attitude control mechanism in the air bleeding device.

FIG. 5 is a vertical cross-sectional side view of an essential part of the air bleeding device showing an arrangement state of a pad and a supporting member.

FIG. 6 is an explanatory diagram showing a cam movement given to the pad under the engagement action of the cam body and the cam follower.

FIG. 7 is an operation explanatory view of the air venting device.

FIG. 8 is an operation explanatory view of the air vent device.

FIG. 9 is an operation explanatory view of the air venting device.

FIG. 10 is a diagram illustrating the operation of the air bleeding device.

FIG. 11 is an operation explanatory view of the air bleeding device.

FIG. 12 is an explanatory diagram of an air vent device according to a conventional technique.

[Explanation of symbols]

10 Cylindrical film 12 Seal body 20 Machine frame (fixed part) 28 Pad 32 Holder 48 Lever 50 Cam follower 52 Cam plate

Claims (2)

(57) [Claims] 1. A pair of seal bodies (12, 12) that are opposed to each other and rotate in mutually opposite directions with a film (10) formed into a tubular shape and supplied vertically are sandwiched between both seal bodies (12, 12) . In a vertical bag-making filling and packaging machine that is end-sealed by sandwiching the tubular film (10) by 12) , holders (32, 32) that move in synchronization with each of the seal bodies (12 ).
Is rotatably supported at a position facing the front side in the rotation direction of the seal body (12) , and the overall length in the width direction of the tubular film (10).
And a size that allows abutting over the required length in the feeding direction.
Width and feeding method for the tubular film (10)
Toward a wide range of required area by a pair capable of contacting pads (28,
28), and disposed on the fixed part (20) of the packaging machine, each of the pads (28)
A cam follower (50) pivotally supported by a lever (48) provided so as to be integrally movable with the cam body (52) for imparting a required cam movement to the pads (28, 28 ) is movably engaged with the cam body (52). When the cam follower (50) moves along the cam surface of the cam body (52) , the pair of pads (28, 28) is tubular.
The film (10) at a speed close to the feeding speed of the film (10)
While close contact with the pair of sealing members (12, 12) is sandwiched between the tubular film (10) immediately before applying end seals,
The pair of pads (28, 28) spread the tubular film (10) on the wide side.
An in- bag air bleeding device for a vertical bag-making filling and packaging machine, which is configured to squeeze air with a required area within a range . 2. A fill which is cylindrically formed and supplied vertically.
A pair that rotate opposite to each other across the frame (10)
It is equipped with the seal body (12, 12) of
End seal is provided by sandwiching the film (10).
In the vertical bag-making filling and packaging machine configured to do so, the holders (32, 32) that move in synchronization with the respective seal bodies (12).
Rotate to the position facing the front side of the seal body (12) in the direction of rotation
It is freely pivoted and placed in the feeding direction of the tubular film (10).
The required length and the entire length of the tubular film (10) in the width direction.
A pair of pads that can contact the tubular film (10) within a required area.
(28, 28) and the fixed portion (20) of the packaging machine, each pad (28)
The cam fob that is pivotally supported by a lever (48) that can move integrally with the
The lower body (50) is movably engaged with the cam body (52), and the cam body (52) includes a cam follower (50) along a cam surface.
By moving, the pair of seal bodies (12, 12) are
Immediately before sandwiching the film-like film (10) and performing end seal
In the pair of pads (28, 28), the tubular film (10)
If the lower end of the surface facing the
Moves closer to the tubular film (10) in an inclined posture away from the
Then, in a position parallel to the tubular film (10), the tubular film
Rum (10) is squeezed with the required area to remove air.
It is configured to be shaped to give the cam motion to perform
An air bleeder in a bag in a vertical bag-making filling and packaging machine.